File: //usr/share/webmin/postfix/help/opt_transport_maps.html
<header>Transport mapping lookup tables</header>
<center><tt>transport_maps</tt></center>
<hr>
The parameter specifies optional tables with domain to (transport, nexthop)
mappings. See <a href=transport>Transport mapping</a> for syntax details.
<p>
By default, this feature is disabled. Specify the types of databases to use.
<p>
Sensible possible values:
<ul>
<li> <tt>dbm:/etc/postfix/transport</tt>
<li> <tt>hash:/etc/postfix/transport</tt>
<li> <tt>hash:/etc/postfix/transport, nis:transport</tt>
<li> <tt>hash:/etc/postfix/transport, netinfo:/transport</tt>
</ul>
<hr>